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Other Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Cost	$ 1,228	$ 1,145
Accumulated Amortization	(1,019)	(950)
Net Cost	209	195
Technologies & Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Cost	668	618
Accumulated Amortization	(566)	(534)
Net Cost	102	84
Contractual Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Cost	5	4
Accumulated Amortization	(5)	(4)
Purchased and Internally Developed Software [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Cost	440	407
Accumulated Amortization	(383)	(347)
Net Cost	57	60
In-process R&D [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Cost	50	51
Net Cost	50	51
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Cost	65	65
Accumulated Amortization	$ (65)	$ (65)

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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+ References

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-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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